Mounting for filter tubes



Feb. 23, 1965v H. J. HELD 3,170,777

' MOUNTING FOR FILTER TUBES Filed Aug. 14, 1961 2 Sheets-Sheet l I 1 Hg. P13 1 )0 56 INVENTOR. HANS J. HELD BY MAW ATTORNEY Feb. 23, 1965 H. J. HELD MOUNTING FOR FILTER TUBES 2 Sheets-Sheet 2 Filed Aug. 14, 1961 INVENTOR. HANS J. HELD CMM Hm ATTORNEY UnitcdStates Patent airs 777 MUUNTWG M313. FELTER TUBES Hans J. Held, Lake Success, N.i assignor to The Ducon Company, Inc, Mineola, N.Y., a corporation of New York 7 Filed Aug. 14, 196i, tier. No. 131,376

'7 Claims. (Cl. 55-490) This invention relates to a mounting tor filter tubes adapted to be disposed in a dust'collector for removing finely divided solid particles from air or other gases.

' A widevariety of dust collectorsutilizing filter tubes have been proposed heretofore. In particular, a wide I variety of dust collectors are presently available which include cloth filter tubes which remove. dust particles by the passageof dust laden air through the cloth filter tubes.

tubes. In order to filter dust laden air of a; high temperature, it. is necessary for the filter tubes to be made from a temperatureresistant material such as fiberglass.

However, experience has demonstrated that fiberglass filter, tubes have a very low tensile strength andcann'ot sustain the movement associated with cleaning of the fiberglass-filter tubes when the tubes are connected or-secured toa plate in a conventional manner.

Heretofore, it has been. conventional to secure the 'upper end of a clothfilter tube around atubular collar by mearisof a metal strap. Such a holding mechanism does not provide fora positive mounting of the filter tube so .the "filter tube. frequently gets loose an dldrops off and causes excessive failure when the filter tubes are made from fiberglass. In addition, many of the filter tube applications require a tube having a length of thirty feet collar is difiicult since the filter tube is applied to the outer periphery of the collar which depends from a plate.

, airs??? Fatenterl Feb. 23, 196.5

ing for the upper end of a filter tube in accordance with the present invention. v FIGURE 3 is an exploded view of the mounting for the filter tube shown in FIGURE 2.

FlGURE 4 is an enlarged section view of the mount- 7 ing for the lower end of the filter tubes.

FIGURE 5 is a transverse sectional view.

Referring to the. drawings in detail, wherein like nu merals indicate like elements, thereis shown in platform 28 is provided with guard rails 30. Hoppers for the dust collector 10 are provided beneath :the filter compartments, one hopper-"be ng provided for Q or more. 1 Assemblyqof a filter tube of su ch length to the! Filter. tubes such as fiberglass maybe mounted in 210- V cordancewith the present invention '-in a manner which a not-occurinthe mounting for the filter tubes in accordance withthe present invention andldamageto the material of the tubes is non eitistent.

lt is an object of the present invention tor-provide a novel mounting for filter tubes adpted to be disposed with- .lna dustcolle ctor;

filtertubesadapted .to be disposed within a dust. collector.

.munication with the compartment 14 by means of the l a dust collector designated generally as 10'.

The dust 'collector'lfl comprises a housing having a plurality of filter. compartments 12, 14 and 16. It will be appreciated that a greater or lesser number of com- 1 partments may be provided. That is, the mounting for the filter tubes of the present invention is not limited to T the number of compartments utilized in a dust collector and may be used in conjunction with a single compart merit. t The compartmentslz and 14 are separated by an imperforate partition 18. .The compartments'l l and 16 are separated by an impcrforate partition MP. The compart- .ment i2 is provided with a door 22st) as to provide access for cleaning and maintenance. Likewise, the compartments l4 and id are provided'with similar access I doors. in this regard, compartment is provided with an accessdoorfli. 1

Thehousing for the filter compartments is disposed on a platforrnztl supported by a support frame 26. Th

each pair ofradjacent filter compartments. Thus, hopper 32-is provided for the filter"compartments 14 and 16. A

hopper 34 is provided forthe filter compartment lzand the filter compartment adjacent thereto. 1 i

Each filter compartment 12, 14- and'l ispr ovidedwith aiperforated bottom tube plate 36. A dust inlet manifold 3 8 extends across and above-the dust collector 10,; "The manifold 38 is'in' communication With-cachet the filter compartments. Thus, the -manifold is in comconduit. The manifold 38 is in communication withthe the compartment 14 :by means ofathe condu'it 4-2.

. inents 12, i4 and do atall times; t V

The cross-sectional area of the conduits 4b, 42 and'44 is substantially less than "thecross-s'ection area'of the filter compartments. :That is, thejcross-sectionaharea of conduit 42 is substantially less than the cross-sectional It is another objectof the present invention to provide apostive mounting'for high temperature, low strength It is another objectof thepresentinvention to provide a novel mounting for a high temperature, low strength fiberglassflfilter tube ;whichproyides a positive secure- {.ment which eliminates slippageand. damage to the filter 3 material.

Itis still ,anotl' era objectotfthe present invention to Y provide a novel mounting-forfan 'end of'a filter tube which is more 'readilyassembl'ed-than those proposed .heretofore, r

' Other objects will appearfhereinafter.

For the purpose of illustrating the invention" there is shown in the drawings a form which is presently pre Likewise, the manifold 38 is in communication with 'thecompartrnent if by rneans of the'conduit 4d.- The manifold 38 is in communication with the compartarea of thechamber 46 above the top tube plate 48 in the compartment 14; top tube plate similar to plate 48 is'disposedin the compartments l2 and 16.

v backwash air duct dli'and. a clean air outlet duct 52 'are'alternatively in communicationwith the compart merits 12, 14 and 1d byineans of an air reversal valve 54.

A valve similar to valve 54 is'providedtm each of the.

cOmpartmen tslZ, i l and 16.

- Filter tubesie having spreaderlrings-S disposed at spaced pointstherealong are s uspended within each of the filterf comparti'rlen'ts from thetop' tube plate; The

,. ferred; it being understood, however, that this invention 7,

is .not limited to the precise arrangements and, instrumentalities shown.

1 FIGURE 1 is a partial elevationalview partly in sec tionot 'a dust collector wherein'filter tubes are mounted -in accordance with-the present invention. a is'anenlargedsectional viewof the mounttubes 5-5 are made from a material capable of filtering dust laden gases. Preferably, the tubes Share made from'. I a fiberglass.material.:j Howevenj-it -will-be understood l that other materials be used. for the tubes 56. When the tubesjfio are made from fiberglass, the spreader rings 58 will not be utilized. LAs shown I e tube 56 overlaps an intermediate e .clea'rly in FIGURES 2 and he; Rever h portion of the tubeEo' and issecured thc'retoby lines-cf 'stitchin'g An annular member' ,62such as a piece of rope place.

posed against the lower surface of the top tube plate 48.

The other end of the collar 66 extends through a hole in the plate 43 and is swaged over against the upper surface of the plate 4-8. so as to provide a radially outwardly directed fiange 72 which may be welded or soldered in The tube 56 is maintained in assembled. relationship with the outer collar as by means ofan inner collar 74.

The inner collar is tubular and ,is provided with an inwardly directed lip 76 at one end thereof. The other end of the, inner collar 74is provided with a radially outwardly directed flange 78. As shown more clearly in FIGURE 2, the flanges '72 andltl are disposed side-byside and may bereferred to hereinafter as being juxtaposed to one another. As shown more clearly in FIG- URE 2, a portion of the tube 56 adjacent the beaded lip 64 is disposed intermediate the flanges 72 and 78. The outer peripheral diameter of the inner collar 74 is designed so as'tto provide a press-fit. That is, the radial distance between the outer periphery of the collar 74 and the tube periphery of the collar as is slightly less than the thickness of the tube 56.

The lower end of the tube Siiis provided with a novel quick acting-mounting means as shown more clearly. in FIGURES 4 and 5. A beaded edge 89 is provided at the lower end of the tube 56 in the samemanner as the beaded edge as at the upper end of the tube 56. An outer collar iron-2'7 4E. ing into the clean air outlet duct 52, the valve 54 is blockin communication between the filter com artments and 82 is disposed around the lower end of the tube as. The collar 82 is provided at one end with a radially outwardly directed flange 84.

i An inner collar 86 extends through a hole in the bottomtube plate'36. A radially outwardly directed flange '88 on the collar 86 is in abutting. contact with a lower surface of theplate 36. The inner collar 86 is provided with an annular. shoulder 9t) in abuttingcontact with the uppersurface of the tube plate as. Thus, the inner collar 8% is fixedly secured to the plate in the same manner as the inner collar 66 is'secured'with respect to the plate The plate 3is provided with a pair. of clips 2 and $4 fixedly secured thereto on the upper surface thereof.

Each of the clips 92 and $4 is provided witha portion rical line extending through the inner collar 3-5, thereby defining oppositelyrdirected channels.

The outer collar 82 is provided with diametrically opl 'posite radially directed lugs 96 and 923. The lug 95 is adapted to be retained in the channel beneath a leg of the clip 92. The lug 98 is adapted to be retained in the channel beneath a leg of the clip.94. When the lugs 95 land 98 are soretained, the fiangetgd and the shoulder 95) prevent the beaded'edge 841 from passing therebetween. Also, an annular portion of the tube 56 is held firm by the outer collar 82 and an annular shoulder 16% on the {inner collar 86.

The operation of the dust collector it? is as follows: High temperature dust laden gases are conveyed to the dust collector 1d by the manifold 33. Such dust laden gases are conveyedto the filter compartments by the conduits 4t), 42,

s and V The dust laden. gas enters the tubes 55 in a downward direction. The gases pass through the back wash air duct 59.

- When it is desired to clean the r lter tubes of one compartment, the valve means for said compartment is repetitively opened and closed so as to alternatively place the compartment in communication with the ducts and 52. The repetitive operation of the valve for one of the compartments causes the tube to alternatively expand and contract. When spreader rings are provided on the tubes, the expansion and contraction of the filter tube 56 is between adjacent spreader rings 58. For example, compare the portions between the spreader rings on the filter tubes in compartments l4 and 16. This movement of the tubes causes dust particles accumulating on the inner surface of the tubes to be collected in the hoppers therebelow.

it is submitted that the above description of the operation of the dust collector it) is sufiicient for an understanding of the problems associated with the mounting of the filter tubes. A more detailed explanation of the operation of the dust collector to may be found in application Serial no. 749,898, filed on July 21, 1958, by Robert R. Leech et'aL, now Patent No. 3,978,646 and entitled:

Dust Collector@ tubes from a position outside of the filter compartments.

Once the upper end of a filter tube is secured, the lower end will be secured by an operator who will be standing on the bottom tube platefit? inside filter compartment.

The inner collar will be secured in the holein the plate in the manner illustrated in FIGURE 4. The outer collar 82 is placed around the lower end-of the filter tube and reciprocated in a direction toward the upper end of the filter tube. Thenthe lower end of the filter tube is disposed so that it surrounds the innercollar 86 as illustrated in vFKBUREA 1 Thereafter, the outer collar 82 is reciprocatcd toward the plate 35 until the lugs as and 98 are juxtaposed to I the upper surface of the plate 35 in the phantom position illustrated in FIGURE 5. .Then the collar 82. is rotated to the solid line position shown in FIGURE 5. This looks tr e outer'collar 82 in place.

7 Thus, it will be seen that the mounting ofthe upper and lower ends of the tube is quick, provides for a positive seeurement of 'thefilter tube, and may be accomplished by unskilled laborers.

The clamping of the tubes 56 in a horizontal plane between thetlanges 72 and 78 provides a positive securement forthe filter tubes. The beaded edge 64 prevents slippage betweenthe filter tubes and collars 66 and 74.

.The positive mounting of the tubesfio and the elimination or" the possibility of slippage completely eliminates the possibility of damage to the material of the tubes 56 as the tubes 55 are expanded and contracted during the cleaning operation ofthe tubes. Removal of the tubes 55 is a simple matter. A tool similar to a bottle opener is. utilized to remove the inner collar 74. Such' tool willpull on a lower edge of the flange 78 while pushing against the diagonally opposite edge of the flange the filtertubes 56 and enter the clean air outlet duct 52 for recirculation to the system, When the gases are pas When the inner collar has been removed from the lower end of the tube 56, then the tube 56 may be withdrawn through the filter compartment and'the outer collar 66 into the chamber 46. p

The mounting for the filter tubes in accordance with the present invention greatly extends'the life of the filter tube. This is especially true when the filter tube is made of fiberglass. Also, the mounting enables a filter tube to be replaced more readily than was possible heretofore with conventional mounting means. By using fiberglass material for the filter tubes of the present invention, it is possible for the dust collector to be utilized with systems having dust laden gas which have a temperature up to 500 F.

While the tubes of the present invention are preferably made from a flexible fiberglass material, it will be appreciated by those skilled in the art that other high temperature, flexible synthetic resins aswell as cotton, wool, silk, etc. may be utilized as the material for the filter tubes. 5

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordnigly, reference sshould be made to the appended claims, rather than to the foregoing specification as indicating the scope of the invention.

I claim:

1. A mounting for filter tubes comprising upper and lower plates, said platesbeing substantially parallel to each other and having aligned holes therethrough, an outer tubular collar extending through a hole in said upper plate, one end portion of a filter tube of flexible material extending through said collar, aninner collar disposed within said one end of said tube, a flange on said inner collar, said flange being juxtaposed to the upper surface of a portion of said upper plate with a portion of said tube disposed therebetween, a second inner collar extending through a hole in said lower plate, said second inner collar having a radially outwardly directed flange at its lower end juxtaposed to the lowermost surface of said lower plate adjacent the hole in said lower plate, the other end portion of said tube surrounding said second inner collar, a second outer collar surrounding said other end portion of said tube, means releasably securing said second outer collar with respect to said lower plate, each set of collars cooperating with a portion of the tube therebetween to prevent slippage of said tube with respect to said collars.

2. A mounting in accordance with claim 1 wherein each end ofsaid tube is provided with a beaded edge, said beaded edges havingdimensions greater than the radial distance extending between the inner and outer collars at each end of the tube.

3. A mounting in accordance with claim 1 wherein said means releasably securing said second outer collar with respect to said lower plate includes at least one radially outwardly directed lug on said second outer collar, a clip on said lower plate, a portion of said clip being spaced from said lower plate so as to define a channel, and said second outer collar being rotatable about its longitudinal axis so as to dispose said lug within said channel.

4. A mounting for filter tubes comprising upper and lower plates, said platesbeing substantially parallel to each other and having aligned openings therethrough, a first outer tubular collar extending through a hole in said upper plate, means coupling said collar to said upper plate including a radially outwardly directed flange on said collar overlying the upper surface of said plate adjacent material extending through said collar and'overlying said flange, a first inner tubular collar disposed within said one end portion of said tube, a radially outwardly directed flange on said inner collar, the flanges on said first inner and outer collars being juxtaposed parallel to each other with a portion of said tube being disposed therebetween, a second inner collar extending through a hole in said lower plate, said second inner collar having a radially outwardly directed flange on its lower end juxtaposed to the lower surface of said lower plate, the other end portion of said tube surrounding said second inner collar, a second outer collar surrounding said other end portion of said tube and clamping said other end portion of said tube to said lower plate, means releasably securing said second outer collar with respect to said lower plate, and each set of collars having opposed peripheral surfaces cooperating with a portion of said tube extending therebetween to prevent slippage of said tube with respect to said collars.

5.,A mounting in accordance with claim 4 wherein a substantial portion of said first inner and outer collars have opposed peripheral surfaces, the radial distance between the outer opposed peripheral surface of said first inner collar and the inner opposed peripheral surfaces of said first outer collar being slightly less than the thickness of said filter tube.

6. A mounting in accordance with claim 4 wherein said filter tube is made from fiberglass, whereby said filter tube may be utilized in a high temperature filtering system.

7. A mounting in accordance with claim 4 wherein said second inner collar includes a radially outwardly directed portion axially spaced from its flange, said lower plate lying in a plane between said second inner collar .flange and radially outwardly directed portion thereof,

and a portion of said second outer collar cooperating with the radially outwardly directed portion of said second inner collar to prevent said tube from slipping therebetween.

References Cited by the Examiner UNITED STATES PATENTS HARRY B. THORNTON, Primary Examiner.

HERBER M R Examine 

1. A MOUNTING FOR FILTER TUBES COMPRISING UPPER AND LOWER PLATES, SAID PLATES BEING SUBSTANTIALLY PARALLEL TO EACH OTHER AND HAVING ALIGNED HOLES THERETHROUGH, AN OUTER TUBULAR COLLAR EXTENDING THROUGH A HOLE IN SAID UPPER PLATE, ONE END PORTION OF A FILTER TUBE OF FLEXIBLE MATERIAL EXTENDING THROUGH SAID COLLAR, AN INNER COLLAR DISPOSED WITHIN SAID ONE END OF SAID TUBE, A FLANGE ON SAID INNER COLLAR, SAID FLANGE BEING JUXTAPOSED TO THE UPPER SURFACE OF A PORTION OF SAID UPPER PLATE WITH A PORTION OF SAID TUBE DISPOSED THEREBETWEEN, A SECOND INNER COLLAR EXTENDING THROUGH A HOLE IN SAID LOWER PLATE, SAID SECOND INNER COLLAR HAVING A RADIALLY OUTWARDLY DIRECTED FLANGE AT ITS LOWER END JUXTAPOSED TO THE LOWERMOST SURFACE OF SAID LOWER PLATE AJDACENT THE HOLE IN SAID LOWER PLATE, THE OTHER END PORTION OF SAID TUBE SURROUNDING SAID SECOND INNER COLLAR, A SECOND OUTER COLLAR SURROUNDING SAID OTHER END PORTION OF SAID TUBE, MEANS RELEASABLY SECURING SAID 